code: def test_split_on_space(self):
      self.assertEqual(
          split_on_space(" salut   les  amis du 59 "),
          ["salut", "les", "amis", "du", "59"],
      )
  
file_path: gensim/gensim/test/test_parsing.py
imports: import logging
  import unittest
  import mock
  import numpy
  from gensim.parsing.preprocessing import remove_short_tokens, remove_stopword_tokens, remove_stopwords, stem_text, split_alphanum, split_on_space, strip_multiple_whitespaces, strip_non_alphanum, strip_numeric, strip_punctuation, strip_short, strip_tags
label_desc: Use image node_id 10 for calling the TestPreprocessing obj's underlying member method code with example usage: obj.test_split_on_space() without return types